Amabhakede Wokubhoboza Anama-Bit Amaqanda

Amabhareli we-core anebhithi ezijikelezayo amele uhlelo lokubhola olukhethekile ngaphakathi kohlaka olubanzi lwezinsiza zokufaka utshani olubukhali olusetshenziselwa ukwakhiwa kwemithi ejulile. Le ngxenye ibandakanya ukuhlanganiswa kwamabhareli akhanyisiwe ane-ukuxhumana kwezibambo ezijikelezayo, aklanyelwe ukuvuselela amasampula e-core ye-rock ngenhla phakathi kokuhamba kwe-boreholes ezakhiweni eziqinisekisiwe ze-rock ezitholakale ngaphansi kwemifino ebonakalayo. Amabhithi ajikelezayo - ahlukaniswa ngezixhumi eziyisiyingi ezinjengezinkanyezi noma ezimhlanganweni ezinamathiselwe - anikela ngenkqubo yokuxhuma elula efanelekile ezimweni ezijulile nezakhiweni lapho izinga lokuvuselela le-core kanye nokusebenza kokubhola kufanele kuhlangane nosizo olusebenzayo. Indawo yomsebenzi eyinhloko yalezi zinhlelo ibandakanya imithi evulelekileyo emphethweni yeziqhuqhuva, imizila yokusika, izinhlelo ze-pile eziphakathi, kanye nezifakwa ze-continuous flight auger ezihamba ziya emgodini wezinsimbi. Ekukhiqizeni kwemizila yokusika, amabhareli e-core avumela abasizi ukuba baqinisekise amandla e-rock, bahlole izikhala zokuguga, futhi baqinisekise ukujula okufanele kokukhanyiselwa ngesikhathi behamba phambili e-borehole ukuze bakhe izihlahla ezilandelayo noma imisebenzi yokugrouta. Kwemizila yokuhlanza ye-diaphragm, lezi zinhlelo zenza kube lula ukubhola phakathi kwezendlalelo ze-rock eziphakathi nokuqinisekiswa kwezakhiwo ezinzima ngaphambi kokwakhiwa kwemikhono ye-pile. Ukulungelelaniswa kwezibambo ezijikelezayo kuyasebenza ezintweni ezixubile lapho izinsiza zokuhlanza ezahlukahlukene nezindawo ezinamandla ezingenakuma zidinga ukuguqulwa kwemibhalo nokuqala ngokushesha. Ngokwenziwa, ukuhlanganiswa kwamabhareli e-core kusebenzelana ngokubhola okujikelezayo noma izindlela zokubhola ezijikelezayo, kuye ngama-akhawunti e-rock. I-barrel - ithubu le-steel elingaphakathi - ihamba ibephakathi kwe-rock ngokujikeleziswa nokulayisha okuphakeme ngenkathi izinto zokusika ebusweni be-bit zihlaba futhi zikhuthaza izinto ze-rock. Izinto ze-core zingena ngaphakathi kwe-barrel; njengoba ukubhola kuhamba phambili, i-core ihlala ngaphakathi kwe-barrel futhi ikhululiwe ngokuhlanganiswa kwe-barrel. Le ndlela yokuvuselela inikeza impendulo ye-geo-ejwayelekile edingekayo ukuze kwenziwe izinqumo zokwakha. Ukuxhumana kwezibambo ezijikelezayo kuvumela ukuzihlanganisa nokuhlangana okungelula ngaphandle kwezinsiza ezikhethekile, kuthuthukisa izikhawu zokushintsha zingaphakathi kwe-rock zihlanganisiwe. Izikhala zokusebenza kule ngxenye zihluka ngokwesibalo se-rock, ukuphakama kokubhola, kanye nezidingo zephrojekthi. Ububanzi obujwayelekile busuka ku-75 kuya ku-150 millimeters ukuze babhekane nezinhlelo ezijwayelekile, ngenkathi ubude be-barrel bujwayelekile buphakathi kwe-1.0 no-1.5 metres. Ukumiselwa kwe-tube eyodwa kanye ne-tube ezimbili kuyatholakala; izinhlelo ze-tube ezimbili zifaka i-barrel ejikelezayo yangaphakathi enciphisa ukulahleka kwe-core ezindaweni ezithintekayo noma ezingazinzile. Izitayela zamabhithi zifaka phakathi ama-diamond afakwe, i-tungsten carbide insert, kanye ne-diamond surface-set, ekhethwa ngokwezinto ezilindelekile ezihlanganisa kusukela kwi-sedimentary rock ethambile kuze kube yi-granite kanye nezakhiwo ze-metamorphic. Izinkomba zokukhetha zifaka phakathi amandla e-rock alindelwe (anawejwayelekile ukuxhaswa ukuthi IQH/5PA), izinga lokuguga, izinga lokuhlukahluka, iphesenti lokuvuselelwa kwe-core elidingekayo, ukuphakamisa kokubhola, kanye neshejuli yephrojekthi. Abasizi bahlola izinhlelo zezibambo ezijikelezayo ngokumelene nezinketho zokuxhumana ezithrini ngokuhambisana nezidingo zokuqala, okulindelwe impilo yokuphila yamabhithi ezinto ezithile ze-rock, kanye nezinhlelo ze-logistics zokuthola amabhithi. Ukukhetha ububanzi be-core kuhambisana nezidingo zekhwalithi yesampula yokuhlaziywa kwe-geo-ejwayelekile ngokumelene nezikhathi zokubhola kanye nokuqina kwemishini. Izindinganiso zemboni ezilawula lezi zinhlelo zifaka phakathi i-ISO 2113 (Ukubhola ngamadayi ku-geo-ejwayelekile - Inqubo nezinsiza) kanye ne-ASTM D2113 (Ukubhola kwe-core ye-diamond yokuhlola indawo), ezibhala izigaba zokubanzi kwe-core, izilinganiso zokuvuselelwa, kanye nezinhlu zezinga. Izindlela zaseYurophu zibhekisela ku-EN 12716 (Ukwenza imisebenzi ye-geo-ejwayelekile ekhethekile - I-Jet grouting kanye nokuhlanganiswa komhlabathi) lapho kunokwenzeka kumatshina wezindonga zokusika.